Merge pull request #110 from datafuselabs/fix/examples-test

fix: executeUpdate bug

Author: hantmac

databend-jdbc/src/main/java/com/databend/jdbc/DatabendPreparedStatement.java

@@ -363,23 +363,33 @@ private List<StatementInfoWrapper> prepareSQL(@NonNull Map<Integer, String> para
     @Override
     public boolean execute()
             throws SQLException {
-        return this.execute(prepareSQL(batchInsertUtils.get().getProvideParams())).isPresent();
+        Boolean r;
+        try {
+            r = this.execute(prepareSQL(batchInsertUtils.get().getProvideParams())).isPresent();
+        } catch (Exception e) {
+            throw new SQLException(e);
+        } finally {
+            clearBatch();
+        }
+        return r;
     }
 
     protected Optional<ResultSet> execute(List<StatementInfoWrapper> statements) throws SQLException {
-        Optional<ResultSet> resultSet = Optional.empty();
+        Optional<ResultSet> optionalResultSet = Optional.empty();
+        ResultSet r;
         try {
             for (int i = 0; i < statements.size(); i++) {
-                if (i == 0) {
-                    internalExecute(statements.get(i).getSql(), null);
-                    resultSet = Optional.ofNullable(getResultSet());
-                } else {
-                    internalExecute(statements.get(i).getSql(), null);
+                internalExecute(statements.get(i).getSql(), null);
+                r = getResultSet();
+                optionalResultSet = Optional.ofNullable(r);
+                while (r != null && r.next()) {
                 }
             }
+        } catch (Exception e) {
+            throw new SQLException(e);
         } finally {
         }
-        return resultSet;
+        return optionalResultSet;
     }
 
     @Override

databend-jdbc/src/test/java/com/databend/jdbc/TestPrepareStatement.java

@@ -8,7 +8,7 @@
 import java.sql.Connection;
 import java.sql.Date;
 import java.sql.DriverManager;
-import java.sql.PreparedStatement;
+import java.sql.*;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
@@ -297,6 +297,15 @@ public void testPrepareStatementExecute() throws SQLException {
             Assertions.assertEquals(1, r.getLong("number"));
             System.out.println(r.getLong("number"));
         }
+        try {
+            Statement statement = conn.createStatement();
+            ResultSet rs = statement.executeQuery("show processlist");
+            while (rs.next()) {
+                System.out.println(rs.getString("id"));
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
     }
 
     @Test
@@ -339,7 +348,7 @@ public void testAllPreparedStatement() throws SQLException {
         String deleteSQL = "delete from test_prepare_statement where a = ?";
         try (PreparedStatement statement = conn.prepareStatement(deleteSQL)) {
             statement.setInt(1, 1);
-            int result = statement.executeUpdate();
+            boolean result = statement.execute();
             System.out.println(result);
         }